This 15-second Game of Thrones nipple-twisting trailer is so short that you could sneeze and miss it, but, remarkably, HBO has managed to make a series of even shorter micro-teasers that you could blink and miss. It's all part of a the premium cable network's strategy to make sure you're as antsy for GoT's return as possible, but it feels like some kind of cruel form of 21st century eyeball torture.